Hiross Chiller Coil Repairs
Job Description: Hiross Chiller Coil Repairs
Area: Hospital in London
Issue Identified: Following a call out our engineer advised that the above chiller had been switched off and required further investigation, pressure leak test and coil repair.
Works carried out:
- Isolated the unit electrically and mechanically.
- Recovered refrigerant into certified cylinder for storage on site.
- Weighed and confirmed the charge.
- Replaced the damaged coils on Hiross Chiller.
- Pressure tested with OFN (oxygen free nitrogen) to locate any leak.
- Once proved released OFN (oxygen free nitrogen) to atmosphere and evacuated system to a minimum of 2 Torr.
- Re-charged with recovered refrigerant and trim charged with virgin refrigerant.
- Test ran and commissioned.
- Completed waste transfer note and handed to on-site representative.
- Completed F Gas records.

ACES Group Can Also Supply and Install New Chillers – Call Us On 01865 890996
Hiross Chillers have a wide range of models with capabilities for sustainable refrigerant options. These units are ideal for applications where temperature control is crucial. Hiross Chillers have been designed to bring efficient, reliable cooling to all types of large commercial applications. ACES engineers are experts in service and maintenance of all Hiross Chiller types. We have engineers based in London 24/7.
Some of the many Hiross Chillers we support
- Hiross Hyperchill Plus
- Hiross Hyperchill BioEnergy Water Chiller
- Hiross Hyperchill Laser Industrial Process Chiller
- Hiross Hyperchill – Industrial Process Chillers

Abbreviations
HVAC – Heating, Ventiliation and Air Conditioning, PLT – Pressure Leak Test, PRV – Pressure Relief Valve, PPM – Planned Preventative Maintenance, OFN – Oxygen Free Nitrogen, AHU – Air Handling Unit, GWP – Global Warming Potential, VRF – Variable Refrigerant Flow, VRV – Variable Refrigerant Volume, ACU – Air Conditioning Unit, FCU – Fan Coil Unit, AC – Air Conditioning, HP – High Pressure, LP – Low Pressure